Siemens SINAMICS GM150, Operating And Installation Instructions

Page: 183 / 258

You use p1242 to define the starting point of the vdc-max controller. The starting point is the
maximum value of the DC link voltage that cannot be exceeded. If the DC link voltage is below
the starting point, the controller remains inactive. The controller gain can be changed by means
of p1250. The set ramp-down remains inactive while the vdc_max controller is active. The
ramp-down time increases the more excess kinetic energy is stored in the drive train.
8.4.3.5 Fan monitoring
Monitoring the fan ensures that the device functions safely. If the cooling is insufficient, an
alarm is output.
8.4.3.6 Speed monitoring with incremental encoder
Permanent speed monitoring enables motor control without an encoder. You can upgrade with
additional incremental encoders under the following conditions:
● When high-performance applications, such as bearing control, require a permanent speed
control.
● For long-continuing applications with low speeds.
8.4.3.7 Controlled stop, EMERGENCY STOP category 1
The EMERGENCY OFF function for controlled shutdown stops the drive by means of a quick
stop process along a deceleration ramp that must be parameterized.
Note
The drive is stopped during controlled deceleration without braking modules with only a very
low % braking torque. Depending on the load machine, the ramp-down procedure may take a
long time.
Connections of the EMERGENCY STOP button
Most of the contacts of the EMERGENCY STOP button are integrated in the control circuit of
the circuit-breaker. The two remaining normally-closed contacts of the EMERGENCY STOP
button are situated on the terminal block.
EMERGENCY
STOP button
Where connected
=.LA-S31:11-12
=.LA-S31:21-22
=.LA-S31:31-32
Circuit breaker con‐
trol circuit
=.LA-X11:9-10
=.LA-X11:5-6
=.LA-X11:7-8 If jumpered STOP; if not jumpered
EMERGENCY OFF (produces an
instantaneous stop command on
the circuit-breaker)
=.LA-S31:51-52 EMERGENCY STOP
customer
=.LA-X51:1, 2
=.LA-S31:61-62 Excitation equipment =.LA-X51:3, 4
Max. connectable cross-section: 4 mm² (AWG 10)
You will find further information in the section "Circuit book" in your operating instructions.
Operation
8.4 Functions
SINAMICS GM150 6SL3815-2LN41-4AA2
Operating Instructions 04/2017
183